Moved dependencies and plugins into integration-test profile.

Moved dependencies and plugins into integration-test profile to clean up the released pom and speed up non-integration-test builds.

The released pom for cf-client-lib included the following dependency: 

~~~
    <dependency>
      <groupId>com.sun</groupId>
      <artifactId>tools</artifactId>
      <version>1.6</version>
      <scope>system</scope>
      <systemPath>/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/../Classes/classes.jar</systemPath>
    </dependency>
~~~

Some maven builds complain about the relative path, and this path is specific to OSX machines (since the release was built on a Mac). 

Moving the `classes.jar` dependency into the `integration-test` profile will prevent this dependency from being included in the released pom.xml in the future. 

The test app dependencies were also moved into the `integration-test` profile for general hygiene.